[PR19983] SBPO_Always not covering all the cases.
Patch by "Roman Kashitsyn" <romankashicin@gmail.com>.
Phabricator revision: http://reviews.llvm.org/D4788

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@214904 91177308-0d34-0410-b5e6-96231b3b80d8